Recording printer



Aug. 23, 1932. s. s. VERNAM ET AL RECORDING PRINTER Filed May 1, 1951 N m M Au NA RH SE. R & WT ER mam ER GF V: B

Ma-r ATTORN EY iii) Patented Aug 23, 1932 PATENT; oF'Fic GILBERT s. VERNAM, or nnoxnnsncx, nnwunnsnv, AND FREDERICK G. I-IALLDEN, or BELLEROSE, NEW YGRK, ASSIGNORS; TO INTERNATIONAL conmunrcnrrons LAB- ORATORIES, 1110,01 nnwyonx, n. 1n, A conronnrron on NEW YORK nncoanine PRINTER" Application mam 1', 1931. Serial No. 534,296.

Our invention relates to improvements in recording printers which operatein accord ance with. transmitted signals. 1 Our invention is applicable to printing or selective telegraph systems of the'start-stop type. In such systems the receiver or record er is provided a rotatingmember or distributor which is kept in'proper: phase relation with the transmitter by being stopped at the end of each signal and again started at the bee bars co-operating with a shifting or inverslon device for the platen to selectively record the characters in accordance with the signals transmitted. v I

Such aprinter is also described and illustrated in Bulletin No. 126, issued December,

1925, by Morkrum-Kleinschmidt Company of Chicago, Illinois, entitled Description of the Tape Teletype (Model 14).

Our inventionmay also be applied to a recording printer for use with automatic'stock quotation board systems wherein it is desirable or necessary to operate the shifting device for the platen afterthe transmission of signals in accordance with certain characters or a particular group of characters.

The object of our invention is to operate the shifting device after the transmisison of any one of a particular group of special stunt signals, and to restore the shifting device to,

its normal position after the transmission of any one of a group of fractional character signals.

Various features of our invention willbe described inthe description to follow:

In describing our invention we will simply refer to the essential features as applied to the receiving printer or recorder.

Referringto the drawing: 1

Fig.1 shows the shifting mechanism and the controlling elements.

Fig; 2 sho-ws a type bar engaging "the platen. 1

Referring to: Fig. 1, the platen -28, gear I wheel 30, and platen shaft 26 correspond to the same named parts illustrated and. described on pages 723 and 726 in connection with Figs.449 and 451 in the publication Telegraphy to which reference has been mae'. The code bars 60 and pull bars 1, 2, 3, 4 and 61 to 68 inclusive correspond to the same named parts described and illustrated on page 721, Fig. 447 of the same publication. The operation of these various parts is also disclosed in theother publication Description of the'Tap'e- Teletype (Model 14) so it will only be necessary to describe the essential features of our invention.

. The movable frame 17 which supports the platen 28 and its co-operating parts is provitledwith an. angle piece 19 having a bearing 20 for the lever 21' which is pivoted'at 22. The opposite end of the lever 21 is provided with an iron armature 23 which is attracted by the-magnet 24 when it is" energized. I T "Also attached toframe 17 by means "of screws 16 is an arm provided with a hook 15 which engages a notched portion 14 of the lever 10 which is pivoted. at 12. The opposite end of the lever 10 has an inclined portion 9 adapted tobe engaged by the bent portionS of the pull bar 1. The opposite end of this pill bar is provided with an offset portion 7 which overlapspull bars 2, 3 and 4.

If desired the offset portion may be extended to overlap additional pull bars.

The pull bars 61-to 68 inclusive are operated in accordance with signals corresponding to fractionalcharacters. The dummy I bar 7 O is also provided with an offset portion 5 which overlaps the other bars 61 to 68 inclusive. The portion 71 operates a set of contacts 56 which closes the circuit of lock- 'The arm 21 operated by this magnet opering relay 51 which in turn operates magnet my ingthrough which the shaft 26 may slide and i300 also with a pin 31 which passes through the frame 17. An adjusting screw 33 is provided as a stop against which the frame 17 rests when it is moved forward.

The operation of our system is as follows:

When a code signal is sent by the transmitter, it causes the operation of the code bars 60 in accordance with such signal.

If, for instance, the operation ofthe code bars is such to select pull bar 1, it will move upward in the usual manner as described'in the publications to which reference has been made.

lVhen the bar moves upward and the apparatus is in the position illustrated, the portion 8 of the bar 1 will engage the portion 9 of lever 10 causing it to swing about thepivot 12 and overcome the tension of spring 11. The movement of the lever causes the notch 14 to disengage the hook 15 and the frame 17 under the influence of tension spring 25 will move toward the bar 32 carrying with it the platen 28 and its co-operating parts. The movement of theframe 17 causes the lever 21 to the right of pivot 22 to swing downward and the armature 23 to move away from the magnet 24. The slot 30 in the angle piece 19 allows free movement of the pin 20 during the operation of lever 21 in either direction.

If signals are transmitted to set or select the code bars 60 to permit the upward movement of the pull bars 2, 3 or 4, their upper ends will engage the projection 7 and cause the same operation of bar 1 to operate the platen.

When signals corresponding to fractional characters are transmitted, a corresponding pull bar of the group 61 to 68 inclusive will be operated. The operation of a pull bar will 1 lift the extension 5 and close contacts 56 which will complete the circuit of relay 51. This relay will then be held energized through its locking contacts 53 and contacts 52 controlled by the lever arm 21.

After magnet 24 is energized contacts 52 are opened thereby opening the circuit of relay 51 causing it to become de-energized and to open the circuit of magnet 24 and to cause it to become de-energized.

The operation of magnet 24 is so timed that the fractional character will be printed or recorded before the magnet operates toshift the position of the platen.

In other words the platen is shifted in the interval between the recording of the fractional character and before another signal is received.

This eliminates the necessity for sending a special shifting signal for the operation of the platen.

The energization of magnet 24 will attract the armature 23 causing the arm 21 to the right of pivot 21 to swing upward and cause the frame 17 to move inward and the hook 15 will again engage the notch 14 to hold the frame 17 in the inward position after the magnet 24 becomes de-energized.

Fig. 2 shows a type bar 35 with characters 36 and 37.

' There will be one of these type bars for each pull bar. When a pull bar is operated, it will I When the platen is shifted to the forward position by spring 25 upon the release of latch 14, it will be in the path of upper case type character 36' when the type bar 35 is operated, as shown in Fig. 2.

From the foregoing description it'will be noted that the platen is shifted to itsnormal or inward position after the transmissionof fractional signals and shifted to the forward or upper case position after the transmission of certain special stunt signals which will cause the operation of any one of the pull bars 1 to 4 inclusive.

lVhat is claimed is: I

1. A device comprising a plurality of type oarsprovided with letter, number and fractional characters, a platen arranged to be shifted to position with said characters, means for receiving signals in accordance with said characters, electromagnetic means rendered operable when fractional character signals are received to shift said platen to position with said letter characters, and means common to a plurality of other signals when received to shift said platen to position with said number characters.

2. A device provided with-letter, number and fractional characters, means for receiving signals in accordance with said characters, means for recording said characters, shifting means, means rendered operable when fractional character signals are received to operate said shifting means to allow said letter characters to be recorded, and means common to a plurality of other signals when received to allow said number characters to be recorded.

3. A device for receiving signals corresponding to letter, number and fractional characters, a two-position shifting means,

means rendered operable when fractional signals are received to operate said shifting means to one position, and means common to a plurality of other characters to operate said shifting means to another position when signals corresponding to these other charachave been recorded, and means common to a plurality of other character signals to operate said shifting means to another position.

5. A device for recording signals corresponding to fractional or other characters, an electromagnet and a plurality of bars, shifting means for controlling the characters to be recorded, means responsive to fractional signals to operate said electromagnet,

the operation of Which causes the operation of said shifting means to one position after said fractional signals have been recorded, and means common to said bars for operating said shifting means to cause it to assume another position.

' 6. A device for recording fractional or other characters, a two-position shifting device for controlling the recording of said characters, means common to said fractional characters for operating said shifting device to one position after said fractional characters have been recorded, and means common to a plurality of other characters for operating said shifting device to the other position.

7 A device for recording fractional or other characters, means for selectively recording said characters, a device commonjzo said fractional characters for operating said selective means after the recording of said fractional characters, and additional means common to a plurality of other of said characters for also operating said selective means.

8. A device for recording a plurality of groups of characters, means for selectively recording said groups of characters, means common to one of said groups of characters for operating said selective means after the characters of its group have been recorded, and additional means common to another of said groups of characters for also operating said selective means.

9. A device for displaying different characters in accordance With transmitted signals, means for selectively displaying said characters, means common to a plurality of characters for operating said selective means after said plurality of characters have been displayed, and additional means common to a plurality of other characters for also oper ating said selective means.

10. A device for recording signals corresponding to fractional or other characters, shifting means for controlling the recording of said characters and means responsive to any fractional signal for operating said shifting means after said fractional character has been recorded.

11. A device for recording signals corresponding to fractional and other characters, shifting means for controlling the characters to be recorded, andmeans common to a plurality of said fractional character signals for operating said shifting means to shift from fractional to other characters after said fractional characters have been recorded.

12. A device for recording signals corresponding to fractional or other characters, shifting means, means for operating said shifting means in response to said character signals, and means responsive to a fractional signal to first record that signal and then cause the operation of said shifting means.

In Witness whereof, We hereunto subscribe our names this 30th day of April, 1931.

GILBERT S. VERNAM. FRED. G. HALLDEN. 

